When to Plant Blackberry in Twin Mountain, New Hampshire (03595)
Location
Twin Mountain, New Hampshire
ZIP Code
03595
USDA Zone
4b
Last Frost
Tuesday, May 5, 2026
📅 Planting Calendar
Direct Sow Outdoors Tuesday, April 7, 2026
Pro Tip: Blackberry can be directly sown outdoors. Plant 4 weeks before your last frost date.
🌿 Plant Details
Scientific Name Rubus fruticosus
Days to Maturity 365 days
☀️ Growing Requirements
☀️
Sun
Full Sun
💧
Water
Regular
Seeds typically germinate in 7-14 days
Other Plants for Twin Mountain
Blueberry Raspberry Strawberry Basil Chamomile Chives Cilantro Dill Lavender Lemon Balm Marjoram Mint Oregano Parsley Rosemary Sage Tarragon Thyme Acorn Squash Artichoke Arugula Asparagus Beefsteak Tomato Beet Bell Pepper Bok Choy Broccoli Brussel Sprout Butternut Squash Cabbage Cantaloupe Carrot Cauliflower Cayenne Pepper Celery Cherry Tomato Chili Pepper Collard Green Common Bean Cucumber Eggplant Endive Fennel Garlic Grape Tomato Green Bean Habanero Pepper Head Lettuce Heirloom Tomato Honeydew Melon Jalapeño Pepper Kale Kohlrabi Leaf Lettuce Leek Lima Bean Mustard Okra Onion Parsnip Pea Poblano Pepper Pole Pea Potato Pumpkin Radicchio Radish Rhubarb Roma Tomato Rutabaga Serrano Pepper Shallot Snap Pea Snow Pea Spaghetti Squash Spinach Squash Sweet Corn Sweet Potato Swiss Chard Tomato Turnip Watermelon Zucchini
Growing Blackberry in Zone 4b
Blackberry (Rubus fruticosus) is a popular garden vegetable. In Twin Mountain, New Hampshire, which is in USDA Hardiness Zone 4b, you should direct sow seeds around Tuesday, April 7, 2026.
Your average last frost date is Tuesday, May 5, 2026. Blackberry grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.